noun, plural met·a·cer·car·i·ae [met-uh-ser-kair-ee-ee] /ˌmɛt ə sərˈkɛər iˌi/. Zoology.
the encysted larva of a trematode, usually found in or on an aquatic intermediate host.
Origin of metacercaria
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
n. pl. met•a•cer•car•i•ae (-ē-ē′)
The encysted maturing stage of a trematode in its intermediate host prior to transfer to the definitive host, usually representing the organism's infectious stage.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.